Mobility

Cross-Layer Optimization for Energy-Timeliness Tradeoff in TDMA Based Sensor Networks

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Executive Summary

Energy efficiency is a critical issue in wireless sensor networks. Energy consumption can be saved by using a lower transmission power, but this also increases the channel error rate and the energy consumption on packet retransmission, as well as the packet delay. In this paper, taking retransmission in physical layer into account, the authors propose a cross-layer strategy to explore the tradeoff between energy efficiency and packet timeliness in Time Division Multiple Access (TDMA) based sensor networks, by transmission power allocation and routing path selection schemes.

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